Saw-recutting mechanism.



PATENTED MAY 26, 1908.

J. 0. GEBHART.

SAW REGUTTING MECHANISM.

APPLIGATJION FILED rm. 1a, 1906.

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PATENTED MAY 26, 1908.

'J. O. GEBHART. SAW REGUTTING MECHANISM.

APPLICATION FILED FEB. 16,1906.

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PATENTED MAY 26, 1908.

J. G. GBBHART. SAW REOUTTING MECHANISM.

APPLICATION FILED FEB. 16, 1906.

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J. 0. GEBHART.

SAW REGUTTING MECHANISM.

APPLIUATION FILED'IEB. 16, 1906.

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JOHN GEBHART, OF ATLANTA, GEORGIA, ASSIGNOR TO ATLANTA UTILITY WORKSINC., OF EAST POINT, GEORGIA, A CORPORATION OF GEORGIA.

SAW-RECUTTING MECHANISM.

Application filed February 16, 1906. Serial No. 301,500.

To all whom it may concern:

Be it known that I, JOHN C. GEBr-IART, a citizen of the United States,residing at Atlanta, in the county of Fulton and State of Georgia, haveinvented new and useful Imi ments being controlled from a single shaftmeans.

The primary object of the invention is to provide a positively operatingmachine for expeditiously recutting gin and linter saws practically inan automatic manner, but without requiring particular attention to anoperative except in applying and removing the saw with relation to asupport therefor.

In the drawings :'-Figure 1 is a side elevation of a machine embodyingthe features of the invention; Fig. 2 is a view similar to Fig.

The bed will be of such surface shape and body construction as toaccommodate the application thereto of the several mechanisms which willbe more fully hereinafter specified. On one end of the bed a shaft 3 isheld in suitable bearings and provided with a band wheel or pulley 4, towhich power may be transmitted from a suitable motive medium and also abalance wheel 5 which has an obvious function. The shaft 3 has aterminal crank 6 to which connection is made for controlling therotatable feed of the saw, as will also be presently explained. Adjacentto the location of the shaft 3 a fulcrum support 7 rises from the bed 1,and has the upper extremity thereof so constructed as to embrace anintermediate portion of a rocker arm 8, the latter being held in thefulcrum Specification of Letters Patent.

Patented May 26, 1908.

support by a suitable pin 9 on which it moves. At its outer end therocker arm 8 is movably attached by'a pin 9 to the upper extremity of alink 10, or crank means cooperating with the shaft 3. To the inner endof the rocker arm 8 a suitable punch 11 is removably secured andoperatively disposed over a die block 12 also removably held in theupper end of a support 13 rising from the bed, and in the presentinstance illustrated as integral with the fulcrum support 7.

On the extremity of the bed opposite that supporting the shaft 3 asupport 14 is located for holding the saw in proper relation to the' dieblock 12 and punch 11. This support 14, as clearly shown by Fig. 3, hasa base 15 held firmly on the bed and supporting a horizontally disposedgear 16, on the upper side of which, upper and lower clamping disks ormembers 17 and 18 are mounted, the gear 16 having a hub projection 19extending into a lower socket 20 of the disk or member 18 and keyed orotherwise secured to the latter, as at 21, to insure a regular rotationof the clamping members with the said gear. Ex tending centrally throughthe clamping members and the gear, and also through the base 15 of thesupport 14 and the bed 1, is a bolt or clamping spindle 22 having itslower headed end 23 normally resting against a washer plate 24 appliedto the under side of the bed over a slot 25 in the latter. This slotpermits adjustment of the support 14 and the parts carried therebytowards and away from the die block 12 to compensate for saws ofdifferent diameters. The upper end of the bolt or clamping spindle 22 isprovided with a nut 26 which maintains, when properly applied to thebolt or spindle, the several parts of the templet and the bed inoperative association. Rising from the center of the lower clampingmember or disk 18 is a hub or boss 27 having an upper reducedscrew-threaded extremity 28 to receive a hand nut 29 which bears on thecentral portion of the upper clamping member or disk 17 and forces thelatter towards the clamping member or disk 18, or against the saw thatmay be held between the two clamping members. The clamping member 17 hasa central opening 30 to fit over the hub or boss 27, the diameter ofsaid hub or boss being such as to permit saws to be readily disposedthereover and removed therefrom.

The gear 19 has motion imparted thereto bers 17 and 18.

through the medium of a pinion 31 fitted over the upper extremity of avertical spindle 32 secured in the base plate of the templet, as clearlyshown by Fig. 3. The pinion 31 has an elongated depending hub 33 whichextends downwardly through the inner portion of an arm 34 projectingfrom the templet, and also through a ratchet wheel 35, said hub be ingkeyed or otherwise secured to the ratchet wheel so that movement of thelatter will be positively imparted through the pinion 31 and the gear19. The pinion 31 and ratchet wheel 35 rotate on the spindle 32, thegear wheel 19 and the clamping members or plates 17 and 18 being alsofree to rotate on the bolt 22. In the outer extremity of the arm 34 apawl 36 is mounted, and thereto is attached the outer end of a rod orreciprocating bar 37, which connects with and receives its motion fromthe shaft 3. Through the operation of this rod or reciprocating bar 37the ratchet wheel 35 is regularly rotated and the pinion 31 similarlyoperated in a like manner to actuate the gear 19 and the clamping mem-By this means the saw held between the clamping members 17 and 18 isregularly rotated by a step-by-step motion over the die block 12.

The machine also includes-means for removing the slight bur or fin fromthe under side of the saw which is caused by the cutting action of thepunch. This attachment consists of a pillow block or support 38 held onthe base 15 of the support 14 and provided in its upper portion with asuitable recess 39 to receive the base of an upwardly projecting socketblock 40 having therein a pair of sockets 41 containing springs 42, thesaid sockets 41 having the lower extremities of pins 43 fitted thereinand engaging the said springs. The pins 43 depend from the under side ofa file holding head 44 comprising two members, one 45 of which isadapted to be clamped closely against the other and secured by aclamping bolt 46. The up per end of the main part of the clamping headis formed with a recess or socket 47 to receive a file member 48 whichis held in close contact with the under side of the saw with a yieldingpressure owing to the pins 43 bearing upon the springs 42. The saw,after leaving the die block 12, and having burs or fins projecting fromthe teeth thereof in View of the operation of the punch, regularlypasses over the file member 48, and the latter removes the burs or finsand completes the operation of recutting the saw teeth. The pillow block38 serves as a guide block in which the socket block 40 hasreciprocating movement, the said block 40 having a rod or reciprocatingbar 49 secured thereto and also to an eccentric 50 on the shaft 3. Bythis means the file head 44 is given a reciprocating movement withrespect to the saw to render the file member 48 effective in removingthe burs or fins from the cut teeth.

From the foregoing it will be seen that the machine is convenient in itsoperation, and that a saw may be regularly and beneficially -recutthereby without requiring manual attention other than the application ofthe saw to or removal thereof from the templet or the clamping membersof the latter.

Having thus fully described the invention, what is claimed as new, is

1. In a machine of the class specified, the combination with saw toothcutting devices, of a horizontally disposed rotatable saw supportingmeans, a reciprocatable filing mechanism adapted to bear against theunder por tion of the cut teeth of the saw with a yielding pressure, thesaid filing mechanism having an automatic vertical movement, and asingle shaft for operating the cutting devices and filing mechanism.

2. In a machine of the class set forth, the combination with toothcutting mechanism, of saw holding means having rotatable clampingmembers, means for imparting a step by step movement to the rotatableclamping members, a reciprocating block held adjacent to the saw holdingmeans, a resiliently supported head carried by the said block, a filemember removably mounted in the said head, and mechanism for operatingthe several parts, the file member being held with yielding pressureagainst the underside of the saw operated upon to remove the burs orfins formed by the tooth cutting mechanism.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOHN C. GEBHART.

Witnesses D. C. LYLE, H. Mnvrs.

